Intelligent current and voltage acquisition device and system

Abstract

The utility model belongs to the technical field of intelligent detection, and discloses an intelligent current and voltage acquisition device and system, and the device comprises an energy collector, a first processor, a first wireless communication circuit, a TMR sensor, and a voltage collector. The voltage collector is arranged to be in non-electrical contact with the detected line of the power cable, a non-contact alternating voltage sensing method can be used for detecting the alternating voltage of the line, the detected line does not need to be connected, power failure construction is avoided, and the energy collector is arranged to be in hanging buckle type contact with the detected line of the power cable, so that the detection efficiency is improved. The energy collector is used for outputting alternating current obtained through induction at the power cable and supplying power to the first processor, the first wireless communication circuit, the TMR sensor and the voltage collector, self-power-taking in the collecting process is achieved, an external power source is not needed, the hardware installation cost can be reduced, and the equipment size is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of intelligent detection, and in particular relates to an intelligent current and voltage acquisition device and system. Background Art

[0002] With the construction of transparent power grids and new power systems, the safe, efficient, green and low-carbon transformation of energy and power systems and the application of digital and intelligent technologies have become development trends. This requires various sensors to monitor parameters such as current, voltage, temperature of power grid lines and the operation status of power equipment in real time. Real-time and accurate detection of current and voltage is one of the important data collection and analysis tasks in electrical parameter measurement in power grid lines.

[0003] To detect voltage, traditional voltage collectors must establish electrical contact with the AC circuit being measured, directly sampling and measuring the voltage. To ensure safety, installation requires a power outage before proceeding, leading to power outages and other issues that can impact industrial production. Furthermore, traditional voltage collectors require an external power supply, such as an external power supply, which is inconvenient to wire and requires the installation of a separate power supply at the construction site, increasing hardware installation costs.

[0004] When detecting current, traditional current collectors use current transformers for current detection. The equipment is large and bulky, which also increases the hardware installation cost to a certain extent. Summary of the Invention

[0005] The purpose of this utility model is to provide an intelligent current and voltage acquisition device and system, which can use a non-contact AC voltage sensing method to detect the AC voltage of the line, without the need to connect the measured line, avoiding power outage construction, and realizing self-powering during the acquisition process without the need for an external power supply, which can reduce hardware installation costs and reduce equipment size.

[0006] To achieve the above-mentioned objectives, the first aspect of the present invention provides an intelligent current and voltage harvesting device, comprising an energy collector, a first processor, a first wireless communication circuit, a TMR sensor and a voltage collector, wherein the energy collector is configured to be in hook-type contact with the power cable line under test, and the energy collector is used to output the alternating current induced from the power cable to power the first processor, the first wireless communication circuit, the TMR sensor and the voltage collector respectively, the first processor is electrically connected to the first wireless communication circuit, the TMR sensor and the voltage collector respectively, and the voltage collector is in non-electrical contact with the power cable line under test.

[0007] In some embodiments, the energy harvester includes an induction coil and a rectification circuit. The induction coil is configured to be in a snap-on contact with the line under test of the power cable. The input end of the rectification circuit is electrically connected to the output end of the induction coil, and the output end of the rectification circuit is electrically connected to the input ends of the first processor, the first wireless communication circuit, the TMR sensor, and the voltage collector respectively.

[0008] In some embodiments, the energy harvester further includes an electronic switch. The input end of the electronic switch is electrically connected to the output end of the first processor and the output end of the rectification circuit respectively, and the output end of the electronic switch is electrically connected to the first wireless communication circuit, the TMR sensor, and the voltage collector respectively.

[0009] In some embodiments, the TMR sensor includes at least two groups of TMR sensing chips and two magnetic conductive members. At least two groups of TMR sensing chips are placed at the connection position of the two magnetic conductive members, and the two magnetic conductive members are snapped onto the line under test of the power cable.

[0010] In some embodiments, the voltage collector includes an induction electrode plate and a signal amplifier. The input end of the induction electrode plate is in non-electrical contact with the line under test of the power cable. The output end of the induction electrode plate is electrically connected to the input end of the signal amplifier, and the output end of the signal amplifier is electrically connected to the input end of the first processor.

[0011] The second aspect of the present utility model provides an intelligent current and voltage acquisition system, which includes the intelligent current and voltage acquisition device as described in the first aspect and a concentrator. The concentrator includes a power supply, a second processor, a second wireless communication circuit, and a data memory. Among them, the power supply is connected to the mains electricity, the second wireless communication circuit is wirelessly communicatively connected to the first wireless communication circuit, the power supply supplies power to the second processor, the second wireless communication circuit, and the data memory respectively, and the second processor is electrically connected to the second wireless communication circuit and the data memory respectively.

[0012] In some embodiments, the system further includes a user terminal, and the second wireless communication circuit is wirelessly communicatively connected to the user terminal.

[0013] In some embodiments, the concentrator further includes a wired communication circuit. The wired communication circuit is electrically connected to the second processor, and the power supply supplies power to the wired communication circuit.

[0014] In some embodiments, the wired communication circuit is in wired communication connection with the user terminal.

[0015] In some embodiments, the concentrator further includes a computer-readable storage medium, which is electrically connected to the second processor, and the power supply powers the computer-readable storage medium.

[0016] The beneficial effects of the present invention are as follows. By setting the voltage collector to be in non-electrical contact with the measured line of the power cable, a non-contact AC voltage sensing method can be used to detect the AC voltage of the line without connecting to the measured line, avoiding power outage construction. Moreover, by setting the energy harvester to be in a snap-on contact with the measured line of the power cable, the energy harvester is used to output the alternating current induced from the power cable to supply power to the first processor, the first wireless communication circuit, the TMR sensor, and the voltage collector respectively, realizing self-power supply during the acquisition process without an external power supply, which can reduce the hardware installation cost and reduce the device volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an intelligent current and voltage acquisition system provided by the present invention;

[0018] Figure 2 is a schematic structural diagram of an energy harvester provided by the present invention.

[0019] DESCRIPTION OF THE REFERENCE NUMERALS:

[0020] 10. Intelligent current and voltage acquisition device; 11. Energy harvester; 111. Induction coil; 112. Rectification circuit; 113. Electronic switch; 12. First processor; 13. First wireless communication circuit; 14. TMR sensor; 15. Voltage collector; 20. Concentrator; 21. Power supply; 22. Second processor; 23. Second wireless communication circuit; 24. Data memory; 25. Wired communication circuit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] For the convenience of understanding the present invention, the specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings of the specification.

[0022] Unless otherwise specified or defined, the "first, second..." used herein is only for differentiating names and does not represent a specific quantity or order.

[0023] Unless otherwise specified or defined, the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] It should be noted that "fixed to" and "connected to" herein can be directly fixed or connected to an element, or indirectly fixed or connected to an element.

[0025] Such asFigure 1 As shown in the figure, an embodiment of the present utility model discloses an intelligent current and voltage acquisition device 10, which includes an energy collector 11, a first processor 12, a first wireless communication circuit 13, a TMR sensor 14, and a voltage collector 15. Among them, the energy collector 11 is configured to be in a hanging and buckling contact with the measured line of the power cable. The energy collector 11 is used to output the alternating current induced from the power cable, and supply power to the first processor 12, the first wireless communication circuit 13, the TMR sensor 14, and the voltage collector 15 respectively. The first processor 12 is electrically connected to the first wireless communication circuit 13, the TMR sensor 14, and the voltage collector 15 respectively. The voltage collector 15 is in non-electrical contact with the measured line of the power cable.

[0026] Among them, the energy collector 11 is hung on the power cable and has no electrical contact with the cable. The energy collector 11 is used to convert the alternating current into an alternating voltage when there is an alternating current in the cable. After rectification, voltage limitation, energy storage, and voltage reduction, a stable low-voltage direct current voltage is obtained to supply power to the first processor 12, the first wireless communication circuit 13, the TMR sensor 14, and the voltage collector 15.

[0027] Exemplarily, as Figure 2 shown in the figure, the energy collector 11 includes an induction coil 111 and a rectification circuit 112. The induction coil 111 is configured to be in a hanging and buckling contact with the measured line of the power cable. The input end of the rectification circuit 112 is electrically connected to the output end of the induction coil 111. The output end of the rectification circuit 112 is electrically connected to the input ends of the first processor 12, the first wireless communication circuit 13, the TMR sensor 14, and the voltage collector 15 respectively. The induction coil 111 is used to convert the alternating current into an alternating voltage when there is an alternating current in the cable. The rectification circuit 112 is used to rectify, limit the voltage, store energy, and reduce the voltage of the alternating voltage to obtain a stable low-voltage direct current voltage. Through the method of taking electricity by induction magnetic core, the energy collector 11 induces electricity from the measured alternating current cable and supplies power to the first processor 12, the first wireless communication circuit 13, the TMR sensor 14, and the voltage collector 15.

[0028] Further optionally, the energy collector 11 further includes an electronic switch 113. The input end of the electronic switch 113 is electrically connected to the output end of the first processor 12 and the output end of the rectification circuit 112 respectively. The output end of the electronic switch 113 is electrically connected to the first wireless communication circuit 13, the TMR sensor 14, and the voltage collector 15 respectively. Among them, the power supply voltage generated by the rectification circuit 112 is supplied to the first processor 12 on one hand, and to the electronic switch 113 for switching and then supplied to the first wireless communication circuit 13, the TMR sensor 14, and the voltage collector 15 for power supply.

[0029] The giant magnetoresistance (TMR) sensor 14 is used to detect the AC current of the cable line under test and send the measured current analog quantity to the first processor 12. Exemplarily, the TMR sensor 14 includes at least two groups of TMR sensor chips and two magnetic conductive parts. The at least two groups of TMR sensor chips are placed at the connection position of the two magnetic conductive parts, and the two magnetic conductive parts are hooked on the power cable line under test. Preferably, the shape of the two magnetic conductive parts is set to be semicircular. When an AC current flows through the cable, an alternating magnetic field is generated between the two magnetic conductive parts. The magnetic lines of force of the magnetic field pass through the TMR sensor chip. The TMR sensor chip outputs the current measurement result (i.e., the current analog quantity), and then transmits the current analog quantity to the first processor 12 for sampling and analysis.

[0030] The voltage collector 15 is used to detect the AC voltage of the cable line under test using a non-electrical contact method and send the measured voltage analog quantity to the first processor 12. Exemplarily, the voltage collector 15 includes a sensing plate and a signal amplifier. The input end of the sensing plate is in non-electrical contact with the power cable line under test. When in use, the sensing plate is placed at a certain distance from the power cable line under test. The output end of the sensing plate is electrically connected to the input end of the signal amplifier, and the output end of the signal amplifier is electrically connected to the input end of the first processor 12. The sensing plate is used to sense a voltage analog quantity proportional to the AC voltage of the cable when there is an AC voltage between the cable and the ground. The voltage analog quantity is provided to the signal amplifier for conditioning and then transmitted to the first processor 12 for sampling and analysis.

[0031] The first processor 12 is configured to receive the analog current value sent by the TMR sensor 14, pre-process the analog current value, convert it into sampled data, and send the sampled data to the first wireless communication circuit 13. Optionally, the first processor 12 is further configured to control and monitor the first wireless communication circuit 13, the TMR sensor 14, and the voltage collector 15.

[0032] The first wireless communication circuit 13 is used to use wireless radio frequency communication to receive control commands from the concentrator 20, convert them into data and provide them to the first processor 12 for analysis; and to receive sampled data sent by the first processor 12 and send them to the concentrator 20 via wireless radio frequency.

[0033] like Figure 1As shown in the figure, this embodiment also provides an intelligent current and voltage acquisition system, including an intelligent current and voltage acquisition device 10 and a concentrator 20. The concentrator 20 includes a power supply 21, a second processor 22, a second wireless communication circuit 23, a data memory 24, and a wired communication circuit 25. Among them, the power supply 21 is connected to the commercial power, the second wireless communication circuit 23 is wirelessly connected to the first wireless communication circuit 13, the power supply 21 supplies power to the second processor 22, the second wireless communication circuit 23, the data memory 24, and the wired communication circuit 25 respectively, and the second processor 22 is electrically connected to the second wireless communication circuit 23, the data memory 24, and the wired communication circuit 25 respectively. Among them, the second wireless communication circuit 23 and the first wireless communication circuit 13 cooperate to achieve wireless communication, and the intelligent current and voltage acquisition device 10 performs data interaction with the concentrator 20 through a wireless communication method.

[0034] Optionally, the intelligent current and voltage acquisition system further includes a user terminal (such as external devices like a user data acquisition terminal), the second wireless communication circuit 23 is wirelessly connected to the user terminal, and the wired communication circuit 25 is wiredly connected to the user terminal.

[0035] Among them, the power supply 21 is used to convert the 110V / 220V commercial power into a low-voltage DC voltage and provide power to other working modules (the second processor 22, the second wireless communication circuit 23, the data memory 24, and the wired communication circuit 25) in the concentrator 20.

[0036] The second wireless communication circuit 23 is used to use wireless radio frequency communication to receive the sampling data transmitted from the first wireless communication circuit 13 of the intelligent current and voltage acquisition device 10, transmit it to the second processor 22, and receive the data transmitted from the second processor 22 and convert it into a wireless signal to be sent to the first wireless communication circuit 13 of the intelligent current and voltage acquisition device 10.

[0037] The second processor 22 is used to process the sampling data received wirelessly from the intelligent current and voltage acquisition device 10, convert it into a wired communication data format, and transmit it to the wired communication circuit 25; and receive the sampling command or control command sent by the wired communication circuit 25, and after converting the sampling command or control command into a format, send it to the first wireless communication circuit 13 of the intelligent current and voltage acquisition device 10 through the second wireless communication circuit 23.

[0038] The data memory 24 is used to store the parameters of the intelligent current and voltage acquisition device 10 (such as the identity ID, address, various data of the intelligent current and voltage acquisition device 10, encryption status, etc.).

[0039] The wired communication circuit 25 is in wired communication connection with the user terminal, and is used to transmit the sampling data collected by the intelligent current and voltage acquisition device 10 to the user terminal through wired communication, and receive the sampling command or control command issued by the user terminal and transmit it to the second processor 22.

[0040] Optionally, the concentrator 20 further includes a computer-readable storage medium (not shown). The computer-readable storage medium is electrically connected to the second processor, and the power supply 21 powers the computer-readable storage medium. The computer-readable storage medium is used to store the programs and data of the above program modules.

[0041] The main working principle of this intelligent current and voltage acquisition system is as follows:

[0042] The intelligent current and voltage acquisition device 10 is installed on the cable, and the fastener on the structure of the intelligent current and voltage acquisition device 10 is used to tightly fasten the body of the intelligent current and voltage acquisition device 10 to the cable. When there is an alternating current on the cable, the energy collector 11 starts to work. As long as the alternating current exceeds the preset start threshold, the energy collector 11 can output a stable direct current voltage. This direct current voltage is provided to the first processor 12 to complete the first power-on self-check function of the intelligent current and voltage acquisition device 10. After the self-check passes, the intelligent current and voltage acquisition device 10 enters the waiting state, waiting for the concentrator 20 to issue a data acquisition instruction. When the data acquisition instruction is received, the intelligent current and voltage acquisition device 10 starts to perform data acquisition.

[0043] When working, the user terminal first issues configuration data to the concentrator 20 through wired communication, configures the corresponding ID, etc. of the intelligent current and voltage acquisition device 10 that the concentrator 20 needs to collect. This configuration information is stored in the data memory 24. At the same time, the concentrator 20 issues a data acquisition instruction to the intelligent current and voltage acquisition device 10 with the corresponding ID through wireless communication.

[0044] After the first wireless communication circuit 13 of the intelligent current and voltage acquisition device 10 receives the acquisition data instruction, it sends it to the first processor 12. The first processor 12 controls the energy collector 11 to supply power to the TMR sensor 14 and the voltage collector 15. After the TMR sensor 14 and the voltage collector 15 are powered, they respectively feedback the current analog quantity and the voltage analog quantity to the first processor 12. The first processor 12 respectively performs analog-to-digital conversion on the feedback current analog quantity and voltage analog quantity. After becoming digital quantities, the digital quantities are sent to the concentrator 20 in a wireless communication manner through the first wireless communication circuit 13. After the second wireless communication circuit 23 of the concentrator 20 receives the digital quantity of the intelligent current and voltage acquisition device 10 with the corresponding ID, on the one hand, it stores it in the data memory 24 for backup, and at the same time forwards it to the wired communication circuit 25, so that the wired communication circuit 25 feeds back the digital quantity collected by the intelligent current and voltage acquisition device 10 with the corresponding ID to the user terminal through wired communication.

[0045] In summary, by implementing the embodiment of the present utility model, by setting the voltage collector to be non-electrically contacted with the measured line of the power cable, the non-contact AC voltage sensing method can be used to detect the AC voltage of the line, without connecting to the measured line, avoiding power outage construction, and improving economic benefits and safety.

[0046] Moreover, by setting the energy collector to be in a snap-fastened contact with the measured line of the power cable, the energy collector is used to output the alternating current induced from the power cable, and supply power to the first processor, the first wireless communication circuit, the TMR sensor and the voltage collector respectively, realizing self-power supply during the acquisition process, without an external power supply, which can reduce the hardware installation cost and reduce the device volume.

[0047] In addition, by integrating a micro TMR sensor to replace the traditional current transformer to detect current, the device volume and weight can be reduced, and the device cost can be reduced. Also, using wireless communication to transmit data, there is no need for wiring, and it is safer to use.

[0048] The above embodiments are not exhaustive listings based on the present utility model. In addition, there may be multiple other embodiments not listed. Any replacement and improvement made without violating the concept of the present utility model fall within the protection scope of the present utility model.

Claims

1. An intelligent current and voltage acquisition device, characterized in that It includes an energy harvester, a first processor, a first wireless communication circuit, a TMR sensor, and a voltage collector. Among them, the energy harvester is configured to be in a snap-on contact with the line to be measured of the power cable, and the energy harvester is used to output the alternating current induced from the power cable to supply power to the first processor, the first wireless communication circuit, the TMR sensor, and the voltage collector respectively. The first processor is electrically connected to the first wireless communication circuit, the TMR sensor, and the voltage collector respectively, and the voltage collector is in non-electrical contact with the line to be measured of the power cable.

2. The intelligent current and voltage acquisition device according to claim 1, characterized in that The energy harvester includes an induction coil and a rectification circuit. The induction coil is configured to be in a snap-on contact with the line to be measured of the power cable. The input end of the rectification circuit is electrically connected to the output end of the induction coil, and the output end of the rectification circuit is electrically connected to the input ends of the first processor, the first wireless communication circuit, the TMR sensor, and the voltage collector respectively.

3. The intelligent current and voltage acquisition device according to claim 2, characterized in that, The energy harvester further includes an electronic switch. The input end of the electronic switch is electrically connected to the output end of the first processor and the output end of the rectification circuit respectively, and the output end of the electronic switch is electrically connected to the first wireless communication circuit, the TMR sensor, and the voltage collector respectively.

4. The intelligent current and voltage acquisition device according to claim 1, characterized in that The TMR sensor includes at least two groups of TMR sensing chips and two magnetic conductive members. At least two groups of TMR sensing chips are placed at the connection position of the two magnetic conductive members, and the two magnetic conductive members are snapped onto the line to be measured of the power cable.

5. The intelligent current and voltage acquisition device according to claim 1, characterized in that, The voltage collector includes an induction electrode plate and a signal amplifier. The input end of the induction electrode plate is in non-electrical contact with the line to be measured of the power cable. The output end of the induction electrode plate is electrically connected to the input end of the signal amplifier, and the output end of the signal amplifier is electrically connected to the input end of the first processor.

6. An intelligent current and voltage acquisition system, characterized in that, It includes the intelligent current and voltage acquisition device according to any one of claims 1 to 5 and a concentrator. The concentrator includes a power supply, a second processor, a second wireless communication circuit, and a data memory. Among them, the power supply is connected to the commercial power, the second wireless communication circuit is wirelessly communicatively connected to the first wireless communication circuit, the power supply supplies power to the second processor, the second wireless communication circuit, and the data memory respectively, and the second processor is electrically connected to the second wireless communication circuit and the data memory respectively.

7. The intelligent current and voltage acquisition system according to claim 6, wherein It further includes a user terminal, and the second wireless communication circuit is wirelessly communicatively connected to the user terminal.

8. The intelligent current and voltage acquisition system according to claim 7, characterized in that, The concentrator further includes a wired communication circuit. The wired communication circuit is electrically connected to the second processor, and the power supply supplies power to the wired communication circuit.

9. The intelligent current and voltage acquisition system according to claim 8, wherein, The wired communication circuit is wired communicatively connected to the user terminal.

10. The intelligent current and voltage acquisition system according to claim 6, characterized in that, The concentrator further includes a computer-readable storage medium. The computer-readable storage medium is electrically connected to the second processor, and the power supply supplies power to the computer-readable storage medium.

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